CR

Cryptocoryne loeiensis

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Cryptocoryne loeiensis faces severe threats from dam construction and water management projects along the Loei River system in Thailand, which alter natural water flow patterns essential for this aquatic plant's survival. Agricultural runoff and urban development in the watershed have degraded water quality through increased sedimentation and chemical pollution. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with habitat modification for rice cultivation and infrastructure development fragmenting remaining suitable areas.

Threat summary

Habitat

This aquatic plant is endemic to specific sections of the Loei River and its tributaries in northeastern Thailand, where it grows submerged in shallow, slow-flowing freshwater with sandy or rocky substrates. It requires clear water conditions with stable flow patterns and is adapted to the seasonal flooding cycles characteristic of the Mekong River basin tributaries.

Wetlands (inland) - Permanent rivers/streams· major

Conservation measures underway

Species recovery

Frequently asked questions

Why is Cryptocoryne loeiensis classified as Critically Endangered?
Cryptocoryne loeiensis is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Cryptocoryne loeiensis faces severe threats from dam construction and water management projects along the Loei River system in Thailand, which alter natural water flow patterns essential for this aquatic plant's survival. Agricultural runoff and urban development in the watershed have degraded water quality through increased sedimentation and chemical pollution. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with habitat modification for rice cultivation and infrastructure development fragmenting remaining suitable areas.
Where does Cryptocoryne loeiensis live?
Cryptocoryne loeiensis occurs in Thailand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Cryptocoryne loeiensis?
The main threats to Cryptocoryne loeiensis are 1.1, 2.3, 5.3, and 7.2. The full IUCN-classified threat record for this species is detailed on the species page.

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